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simmer

to cook sth liquid at a temperature slightly below boiling

sink in

to become completely known, felt, or understood I had to tell him what to do over and over before it finally sank in. The fact that she's left me still hasn't really sunk in.

spending urges

Some people label this type of spending “impulsive.” Others use the word “urge” to describe the feeling that comes just before they whip out the plastic. You can cut up the credit cards, or just use cash and avoid having a debit card.

take it out on someone

to punish or mistreat someone for sth

bring someone into the fold

to welcome them into a group of friendly insiders. Although I've not heard it used of things, I could imagine that to bring a new idea or new proposal “into the fold” might be to welcome it and give it a friendly reception.

alive with sth

full of things that are living and moving

conceited

someone who is vain, arrogant or big-headed